| Nsungwe Formation | |
|---|---|
| Stratigraphic range: Oligocene ~ | |
| Type | Geological formation |
| Unit of | Red Sandstone Group (Rukwa Rift Basin) |
| Sub-units | Utengule Member, Songwe Member |
| Underlies | Unconformity with Lake Beds Sequence |
| Overlies | Unconformity with Galula Formation |
| Thickness | 400 m (1,300 ft) |
| Lithology | |
| Primary | Sandstone |
| Other | Conglomerate, mudstone, siltstone, tuff |
| Location | |
| Location | Rukwa, Mbeya Region |
| Region | African Great Lakes |
| Country |  Tanzania |
| Type section | |
| Named for | Nsungwe River |
| Named by | Roberts et al. |
| Year defined | 2010 |
| Thickness at type section | ~400 m |
The Nsungwe Formation is a formation in the Rukwa Rift Basin of the East African Rift System, it is Oligocene in age based on U-Pb dating of a tuff horizon within the formation. It is part of the Red Sandstone Group along with the uncomfortably underlying Mid-Cretaceous Galula Formation It is divided into two members, the lower Utengule Member, and the upper Songwe member. It is notable for being one of the most important Paleogene fossil deposits in Sub-Saharan Africa.